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Diffstat (limited to 'qemu/roms/ipxe/src/include/ipxe/hyperv.h')
| -rw-r--r-- | qemu/roms/ipxe/src/include/ipxe/hyperv.h | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/include/ipxe/hyperv.h b/qemu/roms/ipxe/src/include/ipxe/hyperv.h new file mode 100644 index 000000000..c61e2a083 --- /dev/null +++ b/qemu/roms/ipxe/src/include/ipxe/hyperv.h @@ -0,0 +1,232 @@ +#ifndef _IPXE_HYPERV_H +#define _IPXE_HYPERV_H + +/** @file + * + * Hyper-V interface + * + */ + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +#include <stdint.h> +#include <ipxe/io.h> + +/** Hyper-V interface identification */ +#define HV_INTERFACE_ID 0x31237648 /* "Hv#1" */ + +/** Guest OS identity for iPXE + * + * This field comprises: + * + * Bit 63 : set to 1 to indicate an open source OS + * Bits 62:56 : OS Type + * Bits 55:48 : OS ID + * Bits 47:16 : Version + * Bits 15:0 : Build number + * + * There appears to be no central registry for the "OS Type". The + * specification states that "Linux is 0x100", and the FreeBSD source + * states that "FreeBSD is 0x200". Both of these statements are + * actually referring to the combined "OS Type" and "OS ID" field. + * + * We choose to use 0x98ae: this is generated by setting bit 63 (to + * indicate an open source OS) and setting the OS Type+ID equal to the + * PnP vendor ID used in romprefix.S. No version information or build + * number is included. + */ +#define HV_GUEST_OS_ID_IPXE ( ( 1ULL << 63 ) | ( 0x18aeULL << 48 ) ) + +/** Enable hypercall page */ +#define HV_HYPERCALL_ENABLE 0x00000001UL + +/** Enable SynIC */ +#define HV_SCONTROL_ENABLE 0x00000001UL + +/** Enable SynIC event flags */ +#define HV_SIEFP_ENABLE 0x00000001UL + +/** Enable SynIC messages */ +#define HV_SIMP_ENABLE 0x00000001UL + +/** Perform implicit EOI upon synthetic interrupt delivery */ +#define HV_SINT_AUTO_EOI 0x00020000UL + +/** Mask synthetic interrupt */ +#define HV_SINT_MASKED 0x00010000UL + +/** Synthetic interrupt vector */ +#define HV_SINT_VECTOR(x) ( (x) << 0 ) + +/** Synthetic interrupt vector mask */ +#define HV_SINT_VECTOR_MASK HV_SINT_VECTOR ( 0xff ) + +/** Post message */ +#define HV_POST_MESSAGE 0x005c + +/** A posted message + * + * This is the input parameter list for the HvPostMessage hypercall. + */ +struct hv_post_message { + /** Connection ID */ + uint32_t id; + /** Padding */ + uint32_t reserved; + /** Type */ + uint32_t type; + /** Length of message */ + uint32_t len; + /** Message */ + uint8_t data[240]; +} __attribute__ (( packed )); + +/** A received message + * + * This is the HV_MESSAGE structure from the Hypervisor Top-Level + * Functional Specification. The field order given in the + * documentation is incorrect. + */ +struct hv_message { + /** Type */ + uint32_t type; + /** Length of message */ + uint8_t len; + /** Flags */ + uint8_t flags; + /** Padding */ + uint16_t reserved; + /** Origin */ + uint64_t origin; + /** Message */ + uint8_t data[240]; +} __attribute__ (( packed )); + +/** Signal event */ +#define HV_SIGNAL_EVENT 0x005d + +/** A signalled event */ +struct hv_signal_event { + /** Connection ID */ + uint32_t id; + /** Flag number */ + uint16_t flag; + /** Reserved */ + uint16_t reserved; +} __attribute__ (( packed )); + +/** A received event */ +struct hv_event { + /** Event flags */ + uint8_t flags[256]; +} __attribute__ (( packed )); + +/** A monitor trigger group + * + * This is the HV_MONITOR_TRIGGER_GROUP structure from the Hypervisor + * Top-Level Functional Specification. + */ +struct hv_monitor_trigger { + /** Pending events */ + uint32_t pending; + /** Armed events */ + uint32_t armed; +} __attribute__ (( packed )); + +/** A monitor parameter set + * + * This is the HV_MONITOR_PARAMETER structure from the Hypervisor + * Top-Level Functional Specification. + */ +struct hv_monitor_parameter { + /** Connection ID */ + uint32_t id; + /** Flag number */ + uint16_t flag; + /** Reserved */ + uint16_t reserved; +} __attribute__ (( packed )); + +/** A monitor page + * + * This is the HV_MONITOR_PAGE structure from the Hypervisor Top-Level + * Functional Specification. + */ +struct hv_monitor { + /** Flags */ + uint32_t flags; + /** Reserved */ + uint8_t reserved_a[4]; + /** Trigger groups */ + struct hv_monitor_trigger trigger[4]; + /** Reserved */ + uint8_t reserved_b[536]; + /** Latencies */ + uint16 latency[4][32]; + /** Reserved */ + uint8_t reserved_c[256]; + /** Parameters */ + struct hv_monitor_parameter param[4][32]; + /** Reserved */ + uint8_t reserved_d[1984]; +} __attribute__ (( packed )); + +/** A synthetic interrupt controller */ +struct hv_synic { + /** Message page */ + struct hv_message *message; + /** Event flag page */ + struct hv_event *event; +}; + +/** A message buffer */ +union hv_message_buffer { + /** Posted message */ + struct hv_post_message posted; + /** Received message */ + struct hv_message received; + /** Signalled event */ + struct hv_signal_event signalled; +}; + +/** A Hyper-V hypervisor */ +struct hv_hypervisor { + /** Hypercall page */ + void *hypercall; + /** Synthetic interrupt controller (SynIC) */ + struct hv_synic synic; + /** Message buffer */ + union hv_message_buffer *message; + /** Virtual machine bus */ + struct vmbus *vmbus; +}; + +#include <bits/hyperv.h> + +/** + * Calculate the number of pages covering an address range + * + * @v data Start of data + * @v len Length of data (must be non-zero) + * @ret pfn_count Number of pages covered + */ +static inline unsigned int hv_pfn_count ( physaddr_t data, size_t len ) { + unsigned int first_pfn = ( data / PAGE_SIZE ); + unsigned int last_pfn = ( ( data + len - 1 ) / PAGE_SIZE ); + + return ( last_pfn - first_pfn + 1 ); +} + +extern __attribute__ (( sentinel )) int +hv_alloc_pages ( struct hv_hypervisor *hv, ... ); +extern __attribute__ (( sentinel )) void +hv_free_pages ( struct hv_hypervisor *hv, ... ); +extern void hv_enable_sint ( struct hv_hypervisor *hv, unsigned int sintx ); +extern void hv_disable_sint ( struct hv_hypervisor *hv, unsigned int sintx ); +extern int hv_post_message ( struct hv_hypervisor *hv, unsigned int id, + unsigned int type, const void *data, size_t len ); +extern int hv_wait_for_message ( struct hv_hypervisor *hv, unsigned int sintx ); +extern int hv_signal_event ( struct hv_hypervisor *hv, unsigned int id, + unsigned int flag ); + +#endif /* _IPXE_HYPERV_H */ |